The northbridge plays an important part in how far a computer can be overclocked, as its frequency is commonly used as a baseline for the CPU to establish its own operating frequency. This chip typically gets hotter as processor speed becomes faster, requiring more cooling. There is a limit to CPU overclocking, as digital circuits are limited by physical factors such as slew rate of operational amplifiers and propagation delay, which increases with (among other factors) operating temperature; consequently most overclocking applications have software-imposed limits on the multiplier and external clock setting.
Evolution[edit]